SR3 Atmospheric Deaerating Feedwater Heaters

Direct replacements for all Schaub Engineering designs


  • 99% OXYGEN REMOVAL prevents boiler system corrosion and costly retubing
  • UNRESTRICTED VENTING assures quick release of liberated gasses and NO BACK PRESSURE for gravity returns
  • ATMOSPHERIC DESIGN requires no safety valves or annual inspection
  • ELECTRONIC INSTRUMENTATION for modulating level control includes a HART compatible differential pressure transmitter, PID controller, and motorized control valve
  • ULTRA SENSITIVE steam regulator provides uniform reliable heating at all loads
  • NO PRESSURE DECAY reduces the chance for pump cavitation
  • STAINLESS STEEL construction of all internal heating surfaces
  • DURATHERM LINING is field renewable and increases the overall system lifespan
  • CUSTOM ENGINEERED PACKAGED SYSTEM with low net positive suction head (NPSH) pumps and high quality components insures reliable service and single source responsibility
  • HIGH TEMPERATURE returns are used for heating
  • LOW PRESSURE returns can flow by gravity back to the deaerator  or can be pumped through the makeup nozzle

Additional Options

  • Pump discharge piping
  • Pump staging
  • Combination motor starters

SR3 .03 cc/l Atmospheric Deaerating Feedwater Heaters – Capacity

Notes: System Includes 48” stand *Includes 12” for panel     **Inlet “K” includes makeup and returns ***Not including boiler feed pumps & panelAll dimensions in inches



Select and customize your feedwater system

Email inquiries to:

or call: Phone: 712-243-5871

Overfill Prevention Valves

Overfill Prevention Valve

An Overfill Prevention Valve is installed at the fill port of a storage tank.Used in a pressurized tight fill application, the valve helps prevent tank overfills by closing when the liquid level reaches a preset warning level (90-95% full). The valve is installed on a standard 6″ NPT male connection and has a built-in bleed hole that allows the fill hose pressure to be relieved afterthe valve closes. This bleed hole also provides anti-siphon protection for the valve. When installed to manufacturer requirements, the Overfill Protection Valve caneliminate hazardous liquid spills.

All models are supplied with an adaptor to mount aluminium drop tubes.
A test mechanism is also sold separately. The test mechanism allows a technician to pull on the test line at any time during the filling process to actuate the float and stop the fill. This allows a technician to verify the valve is working properly.

Overfill Prevention Valve
Subject to Change without notice

• Valve will not function in gravity fill applications
• The estimated flow rate is 550 GPM at 10 PSI pressure drop
• Once closed the valve will allow flow of less than 2% of max flow to
relieve fill line pressure
• A tight fill is required for the valve to operate
• These valves are rated for a maximum pressure of 100 PS

Code Compliance

NFPA 30, 30A, UFC, IFC and PEI/RP2000